Core for manufacturing pneumatic-tire shoes.



W. S, DOLL.

CURE FOR MANUFACTURING PNEUMATIC TIRE SHOES.

APPLICATION TILED JULY 25, 1910.

983,354, Patented Feb I. 1911 wmimmwfim Wan WILLIAM S. DOLL, OF AKRON, OHIO.

CORE FOR MANUFACTURING PNEUMATIC-TIRE SHOES.

Specification of Letters Patent.

Application filed July 25, 1910. Serial No. 573,665.

, To all whom it may concern:

Be it known that I, VVILLIAM S. DOLL, a citizen of the United States, residing at Akron, in the county of Summit and State of Ohio, have invented new and useful Improvements in Cores for Manufacturing Pneumatic-Tire Shoes, of which the following is a specification.

This invention relates to collapsible cores for use in manufacturing tire-shoes for double-tube pnuemat ic tires and the object thereof is to provide a collapsible core ar ranged to be inserted in a tire-shoe for maintaining the same in annular formation during the vulcanization thereof.

Tire-shoes are usually constructed either by completely curing the shoe at one vulcanization or by first giving the carcass a semi-cure, after which the tread is applied and caused to adhere to the carcass by means of a second vulcanization, during which latter operation it has heretofore been customary to insert within the partially-cured car cass an inflatable air bag for maintaining the same in proper shape during the second cure which secures the tread t0 the carcass.

invention more particularly resides therefore in the manufacture of cores to be used with the second described process to the use of the inflatable air bag for holding the tire-carcassin shape during the second curer r 1 i 1 This inventlon contemplates constructing a core ofa plurality of segment-shaped members arranged to be temporarily held togather. and which can be disconnected from each other for the removal. of individual segments through the open inner portion of the tire-shoe after the vulcanization thereof.

It also contemplates a peculiar and novel construction of the segments and the means whereby they are temporarily united together to cause them to assume an annular formation With the foregoing and other objects in I View, the invention consists in the novel construction, combination and arrangement of parts constituting the invention to be herematter specifically described and illustrated in the accompanying drawings which form a parthereof wherein is shown the preferred embodiment of the invention, but it is to be understood that changes, variations and modifications can be resorted to which come within the scope of the'claims hereunto appendE In the drawings in which similar reference numerals indicate like parts in the dif-- ferent figures: Figure 1 is a view in side elevation of a core embodying this invention. Fig. 2 is a. longitudinal, central, sectional view of ,the core shown in Fig. 1. Fig. 3 is a perspective view of one of the segmentshaped members of the core. similar view of a complementary core member. Fig. 5 is a perspective view of a c0upling member for uniting contiguous segment-shaped members; and, Fig. 6 is a transverse sectional view of the core shown in Fig. 1 on line A of Fi 2. I

A core constructed in accordance with this invention, will, when assembled, constitute an annulus, preferably cylindrical in cross-section and is preferably composed of tour segment-shaped members, designated in the drawmgs by the reference numerals 1,

2, 3 and 1. The seglnentshapcd members 1 and 3 are identical, and the mcl'nbers 2 and 1 are also similar to each other in all respects, so that a description of the segmentshapcd members 1 and 2 with the means for coupling them together, will, it is believed, clearly point out the essential and novel features of this invention, and hereinafter the description will be confined as closely as possible to these two members. The segment-shaped member 1 (shown enlarged in Fig. 3) is tubular, as are all the segn'lents of this core, and cylindrical in cross-sectio11 and preferably constructed of drawn tubing, with each end 5 of the segment inwardlyinclined toward each other and terminating at approximately the medial line of said segment, below which are notches 6 with theends thereof at- 7 formed upon curvilinear lines and extending to the inner face of the segment 1. The sides of the notches 6 are provided with circumferentially-extending and inwardly-projecting ribs '8 formed integral with the tubing, if desired, and for a purpose to be later described. The ends of the segment-shaped members land 3 are provided with threaded openings 9 for .a purpose to be later dc cribed.

The segment-shaped member 2, as well as the member 4:, consists of a segment-shaped piece of tubing with the ends 10 thereof inwardly-divergent, the inclination extending to the transverse central line of the member 2,below which the side walls of the segmentshaped members arb provided with notches 11 with the ends thereof at 12 our- Fig. 1 18 a Patented Feb. 7, 1911.

tiguous members, the inner faces of abutting members provided with registering notches to form recesses, coupling members suitablyshaped to be seated in sald recesses and constituting closure means therefor, the edges of said segment-shaped members surrounding said recesses and the edges of said coupling members provided with interlocking means for preventing displacement of the latter and means extending through said coupling members and engaging in the abutting ends of said segment-shaped members for temporarily holding said segmentshaped members in annular formation.

4 A device of the class described comprising a plurality of segment-shaped membersdisconnected from and adapted to abut endwise against each other'to form a collapsible ring-core, the ends of all of said segment-shaped members arranged at angles oblique to the axis of said ringcore and the ends of a portion of said segment-shaped members provided with longitudinally-projecting portions adapted to overlap the complementary ends of contiguous;n1embers, the inner faces of abutting members provided with'registering notches to form recesses,

\ coupling members suitably-shaped to be seated in said recesses and constltuting closure means therefor, and "means extending through said coupling members and engaging in the abutting ends of said segmentshaped members for temporarily holding said coupling members in position and unit ing said segment-shaped members in annular formation.

5. A device of the class described com-' prising a plurality of'segment-shaped members disconnected from each other to form when united a collapsible ring-core, the ends of a portion of said segment-shaped; members inwardly-inclined toward each other, the ends of the other members of said core inwardly and divergently-inclined and arranged to abut against the ends of the firstmentioned members, a portion of said members providedwith fixed lapping members arranged when said core is assembled to lap the inner faces of the complementary portions of the companion members, the ends of contiguous members provided with notches on their inner faces to form longitudinally-extending recesses, coupling members having the outer faces thereof shaped to conform to theinner portions of said segment-shaped members and each adapted to be fitted into one of said recesses, and holding devices extending through said coupling members into suitable openings in the abutting ends of contiguous segmentshaped members for holding said coupling members in position and said segmentshaped members temporarily in annular formation.

In testimony whereof I have hereuntopset my hand in presence of two subscribing wltnesses.

WILLIAM s. DOLL.

Witnesses:

C. E. HUM HREY, GLENARA Fox. 

